Patent GB-568666-A (GB)
Abstract: 568,666. Typewriting computing machines. REMINGTON RAND, Inc. Nov. 23, 1942, No. 16548. Convention date, Oct. 18, 1941.. [Class 106 (i)] A recording and computing machine having a movable carriage and a rack thereon, comprises means on the rack bar to engage an operating member as the carriage moves to close a flick switch to energise a tabulator magnet and set into operation a tabulator unit, and means operated by the movement of the tabulator unit when released to close a tabulator holding switch to hold the tabulator magnet energised. The machine is of the electrified Remington book-keeping type and is based on the construction described in Specifications 559,880 and 534,022. Part of the operating circuit is shown in Figs. 44 and 45, the remainder of the circuit being generally of the type described in Specification 559,880 and employing magnets R1, R3, R5, R8, R9 and sensing devices for the left and right registers of the type fully described in that Specification. Power operated typewriting and tabulating mechanism. A power driven snatch roll 64, under the control of keys, co-operates with hooks 66 to operate the alphabetic type. The usual space bar 83 operates the typewriter escapement 86, which as described later, may also be operated by the date magnet. In the manner described in Specification 534,022, a power-driven shaft 63 carries cams 71, which under the control of the numeral keys, operate the numeral types, and through differentially moved links 82, operate the computing mechanism 89. Vertical and Cross Totalizers. Addition and Subtraction. A number of vertical totalizers 89, are mounted along a truck moving with the typewriter carriage, and are connected in turn by a pick-up beam 97 (Fig. 2, not shown) with a cross totalizer of the usual type which moves with each vertical totalizer until it passes out of the computing zone when the cross totalizer springs back to its original right-hand position. Two cross totalizers may be provided in known manner. The master wheels are operated in known manner by the links 82, and the vertical totalizers carry adjustable cams, which in top, intermediate and bottom positions, condition the cross master wheel to add, non-add, and subtract respectively. Power operated shift and reverse mechanism. In the manner described in Specification No. 559,880, operation of the credit balance key reverses the computing mechanism, irrespectively of its setting, sets the ribbon to red and raises the platen 53 for printing in distinctive type. The shift key or the shift lock key cause shifting but leave the ink ribbon and computing mechanism unaffected. In writing negative totals, the shift mechanism is operated by the usual relay R4. Space, star and triangle magnets and timing switch. The usual escapement rocker 86, Fig. 1, is operated manually by the space bar 83 rocking a sleeve 118, Fig. 7, or by a universal bar actuated by the type bars. Energisation of a space magnet causes snatch roll 64 to pull down a hook 66A, Fig. 7, to depress lever 56 and actuate the escapement. Star and triangle magnets ST, TR1, similarly actuate the escapement and operate the associated type mechanism. In all three cases, a projection 130 on the associated lever 56, through bail 131, depresses plunger rod 135 to close contact 140 to energise the timing magnet T.M., which pushes latch 142 outwards. This causes the rotation of the timing cam 147 and the opening of timing contact 150 until cam 147 has completed one rotation, so keeping the circuit open until the moving parts of the machine come to rest. Automatic tabulator and flick switch. The usual automatic tabulator cam block equal in length to the distance the carriage is to be tabulated is replaced by short blocks which merely flick the switch to energise a tabulator magnet. The short tabulator cam blocks 218 are positioned along the rack bar 214 and momentarily rock an arm 219 to push a rod 222 and flick the automatic tabulator switch 227 (Figs. 29, 44). This energises the tabulator solenoid TAB,-SOL, to lift a finger 270 extendfrom a bail 271 to actuate a latch 266, Figs.; 10, 20. This releases the tabulator cam 257, Figs. 10, 44, which starts to rotate and rocks a bail 255 With an arm 259 which operates the; automatic tabulator holding switch 261, to hold the tabulator solenoid energised. The carriage, accordingly, is tabulated until a stop element 236 on the rack bar 214 encounters a stop slide 235 referred to later, and pushes the slide 235 and any others between it and the pin 237 to rock a plate. 243 to, open the tabulator solenoid breaker switch 247, Fig. 44, to deenergise a relay R8 (Fig. 47, not shown) which releases slowly to allow time for the moving parts to come to rest before opening the circuit to the tabulator solenoid. A similar operation takes place when the skip key is depressed to project a slide 239, Fig. 25, into the path of the known skip stop similar to stop 236 but with a high level projection. Printing is prevented during tabulation when the holding switch 261 operates to energise a relay R1 (Fig. 46, not shown) which opens the printing circuit at its contact COM. The stop slides 235 are advanced by tabulator levers 234, actuated by slides 253 and rocker arms 252. The leftmost rocker arm 252A, Fig. 14, has an interponent 254A, normally positioned for actuation by the bail 255, e.g. at automatic tabulation, whereas the other rocker arms 252 have interponents normally lying below the operative position. The rocker arms 252 are controlled by nine tabulator keys 274A, Fig. 1, numbered 2-0, the zero key being used as a skip key. Each key pushes a link 277 with a cam surface 278 which lifts a bar 280 to lift the corresponding interponent 254 into operative position where it is held by a latch member 281, even when the key 274A is released. When the bail 255 pushes. the interponent to advance the corresponding stop 235, a shoulder 284 on the interponent releases the latch 281. The first interponent 254A has a short bar 280A, Fig. 14, which does not lift the interponent, which is however lifted into inoperative position by the actuation of any of 2-0 keys 274A by a special lift bar 288, when a shoulder 291 on the appropriate lift bar 280 lifts the bail 276, Fig. 20, which engages a shoulder 292 on the lift bar 288. The bail 276 also rocks the latch 266 to start the tabulation cam 257 rotating. The first tabulator key 274A or the palm tabulator key 290 (Fig. 3, not shown), actuate a push link 277A to push a slide plate 294, which swings the special lift bar 288 through a spring connection into the position shown in Fig. 14. This removes the shoulder 292 from the rising bail 276, while the bail 280A latches up in the usual way without affecting the interponent 254A, which remains in operative position to advance the appropriate stop 235. Any of the keys 274A can be operated by a mere flick. Tabulator unit (holding type). In a modification, designed for cheapness, the first tabulator key 274A and the palm tabulator can be operated by a flick, but the others must be held down. The bail 271, Fig. 20, has a second finger 301 connected to the first lift bar 280A, which has no shoulder 291. Automatic energisation of the tabulator solenoid rocks the bail 271 and lifts the bar 280A and consequently lifts the first interponent 254A, which like the others, must now be lifted into operative position. The first tabulator key or the palm tabulator push the link 277A to lift the bar 280A, which rocks the finger 301 and the bail 271 to release the latch 266 as before described. Operation of the other keys, however, in raising bars 280, Fig. 19, rocks the bail 276. Bail 276 actuates the latch 266, to free the tabulating cam 257, but opens the contacts 304, to prevent energisation of the tabulating solenoids, so that these keys must be held down until tabulation is completed. Sensing device and control contacts. The machine has a sensing device 305 (Fig. 2, not shown) of the type described in Specification 559,880, but for accounting in decimal currency only. On top of the tabulator stops 236, upper and lower control cams 308, 309 are set in desired positions along the tabulator rack bar 214, for engaging upper and lower slide plates 306, 307 for controlling a set of contacts 310, Fig. 1, in a circuit generally similar to that described in Specification 559,880. The control cams are of various types according to the operations required, as below. Total from left register 94. This cam, Fig. 35, has two levels, A.C. and GOM. The first actuates the lower slide plate 307 to close the A.C. control contact to apply power to the printing magnets, and a total is printed with stars or spaces to the left of the highest significant figure in the manner described in Specification 559,880. Check numbering is achieved by using an injector control cam 330, Fig. 32, with an upper level cam 329. At tabulation to the desired, column the cam 329 closes contact TR1, Fig. 44, and opens the contacts 2-0, while the cam 330 closes the A.C. and COM contacts. This causes " one " to be entered into an appropriate part of the register. With a decimal space style of register, a modified cam 348, Fig. 31, is used for this operation. The number of the successive checks is subsequently sensed and printed automatically. Automatic printing, with adjacent registers. For spacing the carriage automatically without tabulation from one register to the next when there is no intervening space a special cam 350, Fig. 41, is used, corresponding to two or more cams, Figs. 35, 36, of the usual type for taking totals, arranged in overlapping sequence. The gap 351 causes the opening of the printing magnet circuit while maintaining the star or triangle printing circuit according to whether a sub-total or a total symbol is required. For a star symbol, when the left register is cleared, the usual clear signal mechanism (Fig. 47, not shown) closes a circuit